Global Patent Index - EP 0086521 A1

EP 0086521 A1 19830824 - Switched-mode self-oscillating supply voltage circuit.

Title (en)

Switched-mode self-oscillating supply voltage circuit.

Title (de)

Selbstschwingende getaktete Spannungsversorgungsschaltung.

Title (fr)

Circuit d'alimentation à découpage autooscillant.

Publication

EP 0086521 A1 19830824 (EN)

Application

EP 83200154 A 19830127

Priority

NL 8200616 A 19820217

Abstract (en)

[origin: ES8401296A1] A switched-mode self-oscillating supply voltage circuit for converting an input voltage into an output d.c. voltage which is substantially independent of variations of the input voltage and/or a load connected to the output voltage. The circuit comprises a first controllable switch connected in series with a transformer winding and a second controllable switch for turning-off the first switch. The conduction period of the first switch is controlled by means of a control voltage present on a control electrode of the second switch. The circuit can be switched-over to a stand-up state in which the energy supplied to the load is reduced to zero. A starting network is connected between the input voltage and the second switch so that the current therein flows through the second switch during the period of time this switch conducts and does not flow to the control electode of the first switch in the stand-by state.

IPC 1-7

H04N 3/18

IPC 8 full level

H04N 3/18 (2006.01); H02M 3/338 (2006.01); H04N 5/63 (2006.01)

CPC (source: EP US)

H02M 3/3385 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB IT

DOCDB simple family (publication)

EP 0086521 A1 19830824; EP 0086521 B1 19850821; DE 3360581 D1 19850926; ES 519795 A0 19831116; ES 8401296 A1 19831116; JP H0414828 B2 19920316; JP S58151777 A 19830909; NL 8200616 A 19830916; US 4486822 A 19841204

DOCDB simple family (application)

EP 83200154 A 19830127; DE 3360581 T 19830127; ES 519795 A 19830215; JP 2545283 A 19830217; NL 8200616 A 19820217; US 46041783 A 19830124